The influence of the arc plasma treatment on the structure and microhardness 100Cr6 bearing steel
Journal Title: Archiwum Odlewnictwa - Year 2010, Vol 10, Issue 2
Abstract
The effect of arc plasma treatment on structure and microhardness of 100Cr6 steel was investigated. Four different the current intensity has been used to remelting surface of the steel. SEM and LM microscopes have been used to evaluate microstructure of remelted zone (RZ). In the remelting zone (RZ) were obtained characteristic for rapid crystallization process the dendritic cell structure. Inside the dendritic cells in dependency to current intensity of arc, the martensite or bainite and retained austenite was observed. On the boundaries of the dendritic cells as a result of segregation of C and Cr the alloyed cementite is formed. The cooling rate of the remelted zone is higher than the cooling rate obtained in the classical heat treatment. The maximum hardness 840 HV0,1 was measured in material after treatment with a smaller current intensity of arc plasma – 60A. Increases of the current intensity of arc plasma from 60 A to 110 A (for fixed speed rate of source) lead to increases the depth of the remelted zone from 1,5 to 2,3 mm.
Authors and Affiliations
W. Bochnowski
Keywords
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